Improvement in printing-presses



2 sheefs-sheeuQ G. W. HUNT.

Printing-Presses.

Patented May 20,1873.

UNITED STATES PATENT OEEICE.

GEORGE W. HUNT, OF NEWBURG, NEW YORK.

IMPROVEMENT IN PRINTINGPRESSES.

Specification forming part of Letters Patent No. 139,156, dated May 20,1873 application led.

May 31, 1872.

`Printing-Presses, of which the following is a specification Theinvention relates to the bed and the manner in which the same isoperated "to a small extent, in combination with a platen having agreater motion. The bed has a movement to and from the platen at aperiod while the said platen is held stationary. The bed after theimpression is given is drawn back, and remains at rest While theinking-rollers pass down and up over its face and type., and rest uponand receive their ink from a cylinder placed over it. The invention alsorelates to the method of attaching or hin gin g a vibrating platen to ashaft placed in front of the line of its face, in order to -shorten thepoint of vibratio'n, and at the same time allow the inkingrollers topass down between said shaft and the platen as required in inking theform or type, and the means employed to vibrate said ,platen to and fromthe operator, and hold the same stationary While at the extreme of eachmovement. At one extreme it is'held stationary in a position nearlyhorizontal with its face up to receive the sheet to be printed. At theotherextreme it is held stationary in a vertical position to receive theimpression, which is given by the forward movement of the-bed. Theinvention further relates to inkcarrier rollers in connection with asecond or intermediate cylinder, the object of which is to break up andeven the ink as received in a crude state, or from the fountain, bywhich means the ink is evenly and smoothly laid upon the distributioncylinder, and transferred from the same to the i'ormrollers. Theinvention further relates to adjustable guides or ways, by which thecarrier-frame and the form-rollers suspended in said frame are kept intheir position, and made to move parallel with the face of the bed andtype, and to be dellected from a right line to receive the ink from thecylinder. These ways are so construct- 'ed and attached to side framesas toadmit of their being moved toward or `away' from the face of bed bymeans of a hand-lever upon the top of press to which they are connected,and by which and `through angular slots in the ears on the back of saidWays, un upward and downward and angular movement is given, and theform-rollers, when required, moved away from the type and `cylinder, andpass clear from each. By this arrangement the form-rollers are preventedfrom resting upon the type n or cylinder, or from taking or distributingthe ink only as required in printing, thus avoiding the `serious evildue to superfluous ink. 1t also holds the rollers entirely clear whenthe mechanism is at rest. The invention further consists in thecombination, with an adjustable cam imparting motion to the bed, of anovel shipping mechanism, for throwing the cam in and out of gear, withthe devices intermediate between it and the bed, as occasion mayrequire. The invention further consists in connecting the bed and theplaten in such a manner that the latter will forni acounteractingabutment against the reaction of the former in making the impresslon. A

The following is a description of whatl consider the best means ofcarrying out the invention.

The accompanying drawinglforms a part of this specilication.

Figure l is a side view of my improved press, showing the platen in aposition to receive the sheet to be printed; also the operating partsconnected thereto. side view, showing the platen raised and receivingthe impression from the bed. Fig. 3 is a vertical section, showinginterior of press.. Fig. 4 is a rear view of the same. Fig. 5 is aninside view of spur-wheel detached from its position, in orderto moreclearly show the operating parts of the press and the grooved can] uponits inner face.

Similar letters of reference indicate like parts in all cases.

A is the frame of press, substantially constructed of cast-iron, andconnected by crossgirths 14 and 15, to which the sides are bolted;

B, the bed, upon the face of which the form.

or chase containing the type is secured` by the hook projections at thebottom and the clamp-hook at the top, as shown. `This bed B is supportedby the standards hb u-ponthe shaft C near the bottom of press; saidshaft Fig. 2 is a has end bearings in the sides A. A forwardand-backwardmovement is given to the bed B by the attached link V and impressionbeamU, operated by means of the arm T, stud and roller 4, by the cam S,carried upon the shaft M. Upon the outer end of this shaft M thespur-wheel L is attached and operated by the pinion N upon thecrankshaft n by the treadle z5, momentum being given by the iiywheel 5.It will be understood that power may be applied, if desired. Upon theinner side-of the spur-wheel L is a cam-shaped groove, l. By theVrevolving of said wheel and the formation of the cam an intermittentvibratory movement is imparted through the arm 7c and stud and rollerlof/"to the segment K, and thus to the matched segment which is fast toand forms a part of the crank H, keyed to the rocking shaft J and crankH on the opposite end of the rock-shaft J. This crank H, with anothersimilar one, H', gives motion, by the connecting-rods Gr G, to theplaten D. Said platen D is adjusted and attached by theimpression-screws d d d d to the platen-beam E, and suspended upon theshaft e by the beamarms E', and counterbalanced by the weight F at theiropposite ends. Two cylinders, W and Z, are mounted above the bed B, andon top ofthe frame A, and an ink-fountain, y, and its roller Y. One ofthese, a revolving and vibrating cylinder, Z, is placed over and alittle back of the face of the bed. Directly behind, and between saidcylinder and inkfountain, parallel with it, is mounted a smaller orintermediate ink-.breaking cylinder, YV.A These cylinders W and Z derivetheir motion from the spur-wheel L and an intermediate gear wheel, 1,meshing into pinions 2 and 3 on the ends of their respective shafts.Attached to the impression -beam U, and projecting upward, arecarrier-arms X X, supporting two rollers, 3a and 3b, resting in slots inthe top of-the same. As the beam Urocks to give the movement to the bedB it also vibrates the arms X X, and moves the rollers 3 and 3b forwardand backward, conveying ink, by the roller 3b from the fountain-rollerY, to the intermediate cylinder W, and conveying the ink, well brokenand evenly laid by the roller 3a, from the cylinder W to thedistributing-cylinder Z. To the sides of press7 and directly behind thebearers of bed B, are mounted adjustable ways or grooved guides R, intowhich play rollers attached to the under side of the carrier-frame P.These ways are provided with ears attached to their backs, in which areangular slots, and they are held in position by screw-pins r, with flatheads, fitted to the slots, and screwed into the side framesA. The topsof these ways R are connected together by a crossgirth, to the center ofwhich is attached a link connecting with the handlever R2 placed aboveit. This hand-lever is provided with a pawl, which drops into niches inthe top of the stand in which the lever BP is pivoted, and holds thesame in posi-tion when operated.

The ink-rollers p p p are moved down and up again as follows: Uponeither sidc of the press are curved levers O, having bearin gs uponstuds secured in side frames A, and directly opposite the stud orbearing of segment K and equidistant from the center of shaft M. Theback end of these levers O are connected together by a weight, o1, tocounterbalanceI the weight of their front projecting ends and thecarrier-frames P, to which they are connected by the links o2. To one ofthese levers is an attached arm, Q, provided with a stud and roller, q,fitted to the cam-groove l on the inner side of the spur-wheel L.

It will be noticed that the levers O and the segment K receive their:motion from the same cam-groove l, and have their center bearings onopposite sides of the shaft M, in a direct line with the center of thesame, and are operated alternately with each other. Thus, when theplaten D is down receiving the sheet the levers O are passing thecarrierframe P, with the inking-rollers p p p down and up over the faceof the bed or type, and when the rollers are returned to the cylinder Z,resting upon and receiving their ink, the platen Dis raised and receivesthe impression, and is lowered again to its former position. The cam S,mounted upon the shaft M.. by means of a feather, may be moved away fromthe arm T and its vroller t at will.

V/In such case the operation of printing is suspended as follows: Thelever 9, pivoted near its center :in the bracket org/side frame, isforked at the top end and fitted into the groove S in the hub of saidcam. The lower end of said lever is connected to the crankwheel 11 onthe crank-rod 13 by the link 10. The crank-rod 13 is suspended inbrackets on the outside of frame, and has a handle, 12, ient for theoperator. By raising said handle, and thus turning the rod and wheel, aforward movement is given to the lower end of the forked lever 9, and anopposite movement to the top or connected end, thus withdrawing the cam,as stated. By lowering the handle 12 again, the said cam is made toresume its former position. The backward strain of the impression isreceived by the impression-beam U, which has its bearings in the sidesA, and is counteracted upon by the crank-shaft J, which passes throughand has its bearings on said beam, with attached cranks H H and theplaten D, connected and held in position'by the rods G G.

I claim as my invention-- 1. The platen D, moved directly toward the bedtill nearly in contact therewith, where it remains stationary, incombination with the bed B, moved toward the platen to complete theimpression, all substantially as specified.

`2. In combination with the above, the vibrating mechanism for theplaten, having the attached to its front end conven? rods G, cranks HH', segment K, arm k, and

cam l, arranged to give a lateral motion to the platen from the sameshaft M which operates the bed, and to hold it with the crank on thecenter during the motion of the bed, asset forth.

3. A platen vibrating from a nearly horizontal to a nearly verticalposition, and remaining stationary in each extreme position, whenmounted on a fixed axis, e, arranged a little in front of the plane offace, as and for the purpose specified.

4. The fountain-roller Y, distribution-cylininder Z, and inking-rollers,in combination With the intermediate ink-cylinder W andtraveling-rollers 3a and 3b, substantially as and for the purposespecified.

5. The bed and the distribution-cylinder Z,

in combination with the form-rollers and the 7. The impression-beam U,linkV, and bed B, in combination 'with crank-shaft J, which passesthrough, and has its bearings in, said beam U, cranks H H attached tothe projecting ends of said shaft, connecting-rods G, and platen D,connected substantially as and for the purpose specified.

Witnesses: GEORGE W. HUNT.

J osEPH A. MUNN, GHAs. P. SANDFORD.

